In situ studies of wear mechanisms in magnetic thin-film disks
In situ studies of wear mechanisms in magnetic thin-film disks
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DOI：
10.1080/10402009708983692
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
S. Forehand;B. Bhushan
中科院分区：
文献类型：
--
作者：
S. Forehand;B. Bhushan
采用接触启停（CSS）试验和连续拖动试验对磁性薄膜硬磁盘的磨损机理进行了详细的原位分析。静摩擦系数和盘表面反射率在接触启动/停止测试期间测量，并且动摩擦系数、声发射均方根、声发射计数和盘表面反射率都在连续阻力测试期间测量。这是第一次同时使用摩擦，声发射和光学反射传感器的磨损研究。原位测量用于确定磁性薄膜磁盘故障的前兆，比较CSS和阻力试验中的磨损过程，并将CSS和阻力试验关联起来。圆盘磨损遵循润滑剂耗尽和/或局部抛光涂层粗糙的模式。与CSS测试相关的滑动距离比连续拖动滑动距离对磁盘的损害更小。在这项研究中使用的传感器的组合，特别是用于测量磁盘反射率的变化的光学传感器，已被证明是有价值的，在理解故障机制。
Contact start-stop (CSS) tests and continuous drag tests are used for detailed in situ analysis of wear mechanisms in magnetic thin-film rigid disks. Coefficient of static friction and disk surface reflectance are measured during the contact start/stop tests and coefficient of kinetic friction, acoustic emission rms, acoustic emission count, and disk surface reflectance are all measured during the continuous drag tests. It is the first time that friction, acoustic emission and optical reflectance sensors are used simultaneously for wear studies. In situ measurements are used to determine precursors to failure of magnetic thin-film disks, to compare wear processes in CSS and drag tests, and to correlate CSS and drag tests. Disk wear is seen to follow a pattern of lubricant depletion and/or localized polishing of overcoat asperities. The sliding distance associated with CSS tests is less damaging to disks than continuous drag sliding distances. A combination of sensors used in this study, in particular an optical sensor used to measure changes in disk reflectance, has been demonstrated to be valuable in understanding the failure mechanisms.